TABLE 4-3 

 Inspection and Proof Tests of Signal Cable Shots 



Procedure 



1. X-ray all DAT Shells at 0° and 90° orientation 



2. Tension proof test: 



a. Shot 4A-3B to 8000 lbs. for 1 3/4 hrs. , 25July, 1968 



b. Shot 3A-2B to 7500 lbs. for 2 hrs., 27 June, 1968 



c. Shot 2A-1B to 8000 lbs. for 11/2 hrs., 24 July, 1968 



d. Shot lA-5116 ft. mark to 9000 lbs., for 3 hrs., 29 June, 1968 



e. Shot 1A-MS2L splice to 5000 lbs. for 1/2 hr., 24 July, 1968 



3. Measure electrical resistance and leakage of all shots before 

 slacking off from proof tension. 



4. Measure length of each shot at 50% and 25% of proof load after 

 successful completion of proof load test. 



5. X-ray all DAT Shells at and 90 orientation and inspect for damage. 



Results 



1. Above procedure completed successfully (See Fig. 4-4). 



2. Initial proof test of shot 3A-2B in April 1968 resulted in pull-out of 

 armor from termination 3A at 6800 lbs. 



3. Initial proof test of shot 4A-3B on 29 June 1968 resulted in pull-out of 

 armor from termination 3B at 6500 lbs. 



4. Initial proof test of shot 2A-1B took place on 30 June 1968 to 8500 lbs. 

 for 2 hours. Subsequently, termination IB was re-done because of 

 suspected electrical leakage. Proof test was therefore repeated. 



5. Elastic stretch of A-5051 signal cable is 0. 64 X lO' ft. /ft. -lb. 



6. Measured lengths given elsewhere in this report. 



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